Forged Flanges
Types of Forged Flanges We Manufacture
Weld Neck Forged Flanges (WNRF)
Weld neck forged flanges provide superior strength and fatigue resistance in critical applications. These forged flanges feature a long tapered hub that is circumferentially butt welded to the pipe. As a result, inspectors can easily examine weld integrity using radiographic methods. Because the bore of the pipe and flange match, weld neck forged flanges reduce turbulence, erosion, and pressure loss within the pipeline.
Forged Flange Applications
Forged flanges are used as a connection component for pipes, valves, pumps and other equipment to form a pipework system. They provide easy access for cleaning, inspection, modification or repairs. Flanges are usually welded onto pipes or screwed onto a threaded pipe end and then joined with bolts to make the connection. The types of flanges are described and shown below:
Slip-On Forged Flanges (SORF)
Slip-on forged flanges slide over the pipe and are secured using fillet welds on both the inside and outside. These forged flanges simplify alignment during fabrication and installation. Consequently, slip-on forged flanges are commonly used in low- to moderate-pressure systems where ease of assembly is important.
Blind Forged Flanges (BLRF)
Blind forged flanges close the ends of pipelines, valves, and pressure vessels. These forged flanges also serve as access points for inspection and maintenance. Because blind forged flanges withstand full system pressure, they are widely used in testing, isolation, and future expansion applications.
Socket Weld Forged Flanges (SWRF)
Socket weld forged flanges include a counterbored socket that accepts the pipe before fillet welding. Since the pipe bore aligns with the flange bore, these forged flanges provide smooth flow characteristics. Therefore, socket weld forged flanges are frequently used in high-pressure, small-diameter piping systems.
Threaded Forged Flanges
Threaded forged flanges connect to threaded pipe without welding. These forged flanges are well suited for low-pressure, non-critical systems where welding is impractical. As a result, threaded forged flanges allow easier installation and disassembly during maintenance.
Lap Joint Forged Flanges (LJRF)
Lap joint forged flanges work in conjunction with a stub end or taft that is butt welded to the pipe. The forged flange itself remains loose, which allows easy alignment during assembly. Because these forged flanges do not include a hub, they offer a cost-effective solution for low-pressure systems requiring frequent disassembly.
Ring Type Joint Forged Flanges (RTJF)
Ring type joint forged flanges provide leak-resistant sealing in high-pressure applications. These forged flanges use a machined groove that compresses a metal ring gasket to form a secure seal. Consequently, RTJ forged flanges are commonly used in oil and gas and other severe service environments. This joint configuration is available on weld neck, slip-on, and blind forged flanges.
Quality Standards and Industry Compliance
All forged flanges produced by All Metals & Forge Group meet applicable international standards. For reference, customers can review specifications published by organizations such as ASTM International and ASME for material and dimensional requirements. Additionally, API standards define performance criteria for forged flanges used in oil and gas service.


U.S. 1 (973) 276-5000 • 1 (800) 600-9290 • Canada 1 (416) 363-2244
Fax: 1 (973) 276-5050 • Sales@Steelforge.com
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In the U.S. 1 (973) 276-5000 / 1 (800) 600-9290.
In Canada 1 (416) 363-2244.
Email us at sales@steelforge.com.

